Add optional dependencies for PAM auth
Add optional dependencies for PAM auth


Former-commit-id: abc0082bea58dc3887ac7335932b3ce727877ca4 [formerly f0e3c1a6974690128162af5b0a839f20f486b422] [formerly f0e3c1a6974690128162af5b0a839f20f486b422 [formerly 1ac8b6425944efcf9bdf775fc3117e2ffb21d306]]
Former-commit-id: a997b968ba13ca8fc1d5c949e525288251a254dc
Former-commit-id: 4beedf154ce8a901507c720d8b8c3ad16188948c
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine